Table 1 Physiological changes with PLR
Measurement/Indicator | Mean ± (SD) legs flat | Mean ± (SD) legs raised | % change of mean with PLR | Mean difference | p value |
|---|---|---|---|---|---|
Pulse rate | 61 ± (10) | 60 ± (9) | -1.6 % | -1 (95 % CI -3 : +1) | >0.05 |
Respiratory rate | 15 ± (2) | 15 ± (2) | 0.0 % | 0 (95 % CI -1 : +1) | >0.05 |
Systolic blood pressure | 115 ± (11) | 107 ± (10) | -7.0 % | -8 (95 % CI -11 : -5) | >0.05 |
Diastolic blood pressure | 72 ± (8) | 65 ± (8) | -9.7 % | -7 (95 % CI -10 : -4) | >0.05 |
IVC-CI - quiet respiration | 0.24 ± (0.12) | 0.17 ± (0.10) | -29.2 % | -0.06 (95 % CI -0.10; -0.02) | <0.01 |
IVC-CI - sniff | 0.57 ± (0.23) | 0.42 ± (0.26) | -26.3 % | -0.15 (95 % CI -0.25; -0.06) | <0.01 |
Stroke volume (mL) | 56.0 ± (13.0) | 69.2 ± (14.2) | +23.6 % | +13.2 (95 % CI +9.6 : +16.7) | <0.01 |
Cardiac output (L/min) | 3.3 ± (0.80) | 4.1 ± (0.88) | +22.3 % | +0.75 (95 % CI +0.55; +0.96) | <0.001 |
Common carotid flow (mL/min) | 770 ± (202) | 773 ± (167) | +0.3 % | +3 (95 % CI -37 : +43) | >0.05 |